// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/win/accessibility_misc_utils.h"

#include "base/logging.h"
#include "ui/base/win/atl_module.h"

namespace base {
namespace win {

    // UIA TextProvider implementation.
    UIATextProvider::UIATextProvider()
        : editable_(false)
    {
    }

    UIATextProvider::~UIATextProvider()
    {
    }

    // static
    bool UIATextProvider::CreateTextProvider(const string16& value,
        bool editable,
        IUnknown** provider)
    {
        // Make sure ATL is initialized in this module.
        ui::win::CreateATLModuleIfNeeded();

        CComObject<UIATextProvider>* text_provider = NULL;
        HRESULT hr = CComObject<UIATextProvider>::CreateInstance(&text_provider);
        if (SUCCEEDED(hr)) {
            DCHECK(text_provider);
            text_provider->set_editable(editable);
            text_provider->set_value(value);
            text_provider->AddRef();
            *provider = static_cast<ITextProvider*>(text_provider);
            return true;
        }
        return false;
    }

    STDMETHODIMP UIATextProvider::get_IsReadOnly(BOOL* read_only)
    {
        *read_only = !editable_;
        return S_OK;
    }

    //
    // IValueProvider methods.
    //

    STDMETHODIMP UIATextProvider::SetValue(const wchar_t* val)
    {
        return E_NOTIMPL;
    }

    STDMETHODIMP UIATextProvider::get_Value(BSTR* value)
    {
        *value = SysAllocString(value_.c_str());
        return S_OK;
    }

    //
    // ITextProvider methods.
    //

    STDMETHODIMP UIATextProvider::GetSelection(SAFEARRAY** ret)
    {
        return E_NOTIMPL;
    }

    STDMETHODIMP UIATextProvider::GetVisibleRanges(SAFEARRAY** ret)
    {
        return E_NOTIMPL;
    }

    STDMETHODIMP UIATextProvider::RangeFromChild(IRawElementProviderSimple* child,
        ITextRangeProvider** ret)
    {
        return E_NOTIMPL;
    }

    STDMETHODIMP UIATextProvider::RangeFromPoint(struct UiaPoint point,
        ITextRangeProvider** ret)
    {
        return E_NOTIMPL;
    }

    STDMETHODIMP UIATextProvider::get_DocumentRange(ITextRangeProvider** ret)
    {
        return E_NOTIMPL;
    }

    STDMETHODIMP UIATextProvider::get_SupportedTextSelection(
        enum SupportedTextSelection* ret)
    {
        return E_NOTIMPL;
    }

} // namespace win
} // namespace base
